extreme vs acme

extreme and acme both are nouns.

Word	Noun	Adjective	Verb	Adverb
extreme	Yes	Yes	No	No
acme	Yes	No	No	No

As nouns, acme is a hyponym of extreme; that is, acme is a word with a more specific, narrower meaning than extreme:

Other hyponyms of extreme include apex, peak, vertex.

extreme (noun)	acme (noun)
the furthest or highest degree of something	the highest point (of something)
the point located farthest from the middle of something	the highest level or degree attainable; the highest stage of development

extreme (adjective)	acme (adjective)
most distant in any direction
far beyond a norm in quantity or amount or degree; to an utmost degree
of the greatest possible degree or extent or intensity
beyond a norm in views or actions